Riyo foreshadowing FGO part 3 just like how he foreshadowed part 2 by having Olga living inside Chaldeas for a while before getting yoinked out by Gudako
It'd be so funny if a few years down the line, we get another story of TM losing their minds because Riyo accidentally spoiled the ending of part2 and the beginning of part3 AGAIN
'Mash, what have you done! You've created a time paradox! You can't go around changing the future!'
August 8 2015, Singularity: Ground Zero...The day of humanity's incineration.The mission to correct this improper history, begins!That's... The senpai of this timeline who fainted after the tutorial battle.The me of this timeline should also be showing up shortly.Let's hide and see what happens.We must proceed carefully, no one should realize that we're intervening with history.We must be secretive, without anyone finding out...There you are, Mash.What's with the daring outfit?WAAH!!pewUh.... He scared me so I unintentionally shot him...There's no trace of him left... What do we do?